Exell Battery A21PX 523 Alkaline Replaces ANSI / NEDA-1306A, IEC-3LR50

A Eveready En133A Batter Replacement

Date: October 17, 2013 Category: View Project
Exell Battery A21PX


Battery ModelA21PX
Terminal TypeFlat Top
Length49.9mm (1.96″)
Diameter16.8mm (0.66″)



  • 1306AP
  • 3LR50
  • 523
  • 6135-99-114-1239
  • A21
  • Mallory TR133
  • A21PX
  • A133
  • APX21
  • BA-1098/U
  • EN133A
  • EPX21
  • PC133A
  • PX21
  • RPX21
  • V21PX
  • Electronica M-402S
  • BULOVA 6 Transistor clock radio
  • Praktica EE2
  • MicroPlus Door King’s transmitters
  • Mieco 25A Code Phone Scrambler
  • 1960s GE General Electric T1170A Transistor Desktop AM Radio

Exell Batteries not only provide consumers with high efficiency, long-lasting performance, they also function as replacement batteries for an array of common and unique applications. Ranging from vintage camera equipment to sophisticated medical testing equipment, Exell Batteries can meet the needs of all consumers.

Exell Battery is one of the few product lines Proudly Assembled in the USA.Made with Alkaline cells, Exell Batteries will last longer and offer consumers excellent reliability.

The A133, or 523, battery is an unusual cell often used in classic cameras. It is used to maintain computer time, date and configuration in certain models of Apple Macintosh computers (Parameter Random Access Memory, Parameter RAM, or just PRAM). This PX21 battery has an NSN number of 6135-99-114-1239 and a US Military part number of BA-1098/U.

This battery is commonly used in Garage Door transmitters, brands from Door King.